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‘X’ is an optical illusion observed in deserts or over hot extended surfaces like a coal-tarred road, due to which a traveler sees a shimmering pond of water some distance ahead of him and in which the surrounding objects like trees appear inverted. Identify X.

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‘X’ is an optical illusion observed in deserts or over hot extended surfaces like a coal-tarred road, due to which a traveler sees a shimmering pond of water some distance ahead of him and in which the surrounding objects like trees appear inverted. Identify X.

(a) Mileage

(b) Mirage

(c) Optical activity

(d) Total internal reflection

The question was asked in an international level competition.

This intriguing question comes from Ray Optics topic in chapter Ray Optics and Optical Instruments of Physics – Class 12

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The correct answer is (b) Mirage

The explanation: Mirage is an optical illusion observed in deserts or over hot extended surfaces like a coal-tarred road, due to which a traveler sees a shimmering pond of water some distance ahead of him and in which the surrounding objects like trees appear inverted.

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